I don’t want to get ahead of the news cycle, especially as Israel is not confirming it, but if Hamas is truly launching chemical weapons into Israel… they’re toast.
Israel’s hands are already almost-completely untied now, and there’s no indication I’m aware that the Egyptian forces massed on the border are equipped for an eastward push.
The Palestinian government (as such) using WMD on Israel will completely free their hands. The usual leftists will bleat in the EU countries (remember when the EU countries loved Israel? Oh, yeah, that was back when Israel was mostly socialist…), but nobody is going to do more than spout some hypocrisy on stage and then step back while everybody else golf-claps at the ass-kicking.